B&S mower engine runs rough

nick_nlMay 15, 2013

I have a mower engine that all of the sudden has started to run a bit rough. The throttle goes up and down at regular intervals (smoke comes out of the air intake of the carb when it slows) and when I set engine speed to a minimum it cuts off. The model number is 28T707 and the type is 1154E1.

Typical sign of fuel starvation. If you are able, shut off the fuel valve or otherwise stop the flow of fuel from the tank to the carb. Remove a possible wire at the bottom of the fuel bowl and unscrew the solenoid or bolt. Catch the fuel and check for water, but probably the jet under that bolt is varnished up.